Выполни действие:

Выполни действие:

1. \( \frac{11}{18} + \frac{5}{12} = \frac{11 \cdot 2}{18 \cdot 2} + \frac{5 \cdot 3}{12 \cdot 3} = \frac{22}{36} + \frac{15}{36} = \frac{37}{36} = 1 \frac{1}{36} \)
2. \( 2 \frac{1}{8} + \frac{3}{16} = 2 \frac{1 2}{8 2} + \frac{3}{16} = 2 \frac{2}{16} + \frac{3}{16} = 2 \frac{5}{16} \)
3. \( \frac{3}{4} + \frac{7}{7} = \frac{3 \cdot 7}{4 \cdot 7} + \frac{7 \cdot 4}{7 \cdot 4} = \frac{21}{28} + \frac{28}{28} = \frac{49}{28} = \frac{7}{4} = 1 \frac{3}{4} \)
4. \( 4 \frac{7}{25} + 2 \frac{4}{10} = 4 \frac{7}{25} + 2 \frac{2}{5} = 4 \frac{7}{25} + 2 \frac{2 5}{5 5} = 4 \frac{7}{25} + 2 \frac{10}{25} = 6 \frac{17}{25} \)
5. \( \frac{5}{12} + 5 \frac{2}{21} = \frac{5}{12} + \frac{107}{21} = \frac{5 7}{12 7} + \frac{107 4}{21 4} = \frac{35}{84} + \frac{428}{84} = \frac{463}{84} = 5 \frac{43}{84} \)
6. \( 1 \frac{11}{18} + \frac{7}{15} = \frac{29}{18} + \frac{7}{15} = \frac{29 5}{18 5} + \frac{7 6}{15 6} = \frac{145}{90} + \frac{42}{90} = \frac{187}{90} = 2 \frac{7}{90} \)